SU1291922A1 - Device for noting indication of secondary electronic timepiece - Google Patents

Abstract

This invention relates to electrical appliances. It can be used in the technique of time measurement. The aim of the invention is to increase the accuracy of timing and taking readings. To achieve this goal, a 4 frequency doubler was introduced into the device, new functional connections were formed. The device contains a bus 1 time pulses, elements And 2, 3, 5, -the fixation tire 6, the element OR 7, the trigger 8, the display unit 9, the counter 0 pulses, the tire II zeroing. The doubler 4 frequencies is built on the delay element and the OR element. The display unit 9 has inputs of 2 zeroes, 20 counts, 23 summations. The error of the moment of fixation of the readings depends on the period of the following impulses on the bus 1., 3 Il. N0 S5 Fmg. }

Description

The invention relates to electrical devices and can be used in the technique of measuring time, as well as in time display devices when it is necessary to record the time of occurrence of certain events.

The aim of the invention is to improve the accuracy of timing and reading,

Fig. 1 shows a functional diagram of the device for recording the readings of the secondary electronic clock; Fig. 2 shows an example of constructing a frequency doubler; FIG. 3 shows an example of the implementation of the display unit.

The device for fixing the readings of the secondary electronic clock contains (FIG. 1) a bus 1 of temporal pulses to which the inputs of the elements 2 and 3 are connected and the input of the frequency doubler 4 whose output is connected to the input of the element 5, another input of which is connected to the fixing bus 6, the output element 5 through the element OR 7 is connected to the counting input of the trigger 8, the forward output of which is connected to the input of the element 3 and the inverse output is connected to the input of the element 2 and the input of the element 5, the outputs of the elements 2 and 3 respectively are connected to counting inputs of block 9 in pecifications and counter pulses 10 whose carry output is connected to an input summing display unit 9 and the input of the OR gate 7, the flip-flop reset input 8, display unit 9 and the pulse counter 10 connected to the bus 11 zeroing.

The frequency doubler 4 contains successively connected delay element 12 and OR element 13, the delay time of element 12 is equal to half the time period of the pulses (Fig. 2),

The display unit 9 (FIG. 3) contains a serially connected decimal pulse counter 14, a decoder 15 and a seven-segment indicator 16 — these blocks form a decade of units, and a series-connected hexadecimal pulse counter 17, a depressor I8 and a seven-segment indicator 19 form a decade of tens seconds, the counting input 20 of the counter 14 is the counting input of the block 9, the zeroing input 21 of the counters 14 and 17 is the zeroing input of the block. 9. Transfer Output

five

five

five

0 5

0 5

the counter 14 through the OR element 22 is connected to the counting input of the counter 7, the second input of the OR element 22 is the summing input 23 of the block 9,

For all possible cases of device operation, the error of the moment of reading is expressed by the following formula

at; t; - item m, where ut; time error

indications;

t is the start time of fixation;

P | T is the time recorded on the indicators 16 and 19 of block 9;

Dj is the number of time pulses received by bus 1 before fixing the readings of the secondary electronic clock from the beginning of their operation; T is the period of time impulses on bus I (1 CJ 0.1 s; 0.01 s, n,). The device works in the following way.

Before starting work, the bus 1 1 is given a pulse, unplugged the new trigger 8, the display unit 9 and the counter 10, Element I 2 is open at the input with a high potential from the inverse output of the trigger 8, the low potential from the direct output of which is closed And I 3. bus 6 - low potential, the closing element And 5, At the output of the transfer of the counter 10 is also a low potential.

In the usual time indication mode, the second pulses pass to the output of the element, AND 2 and arrive at the counting input of block 9, in which the second pulses are counted and the indicators I6 and 19 are controlled, Since element 3 is closed by a low potential from the direct output of the trigger 8 , in the mode of usual indication of the output time of the element And the 3 second pulses do not pass and the counter 10 does not work.

The day of fixation of the readings of the secondary electronic clock to the bus b is given a pulse of duration not less than half the time of the following impulses. From the output of the doubler 4 frequencies to the output of the element I 5 a time pulse passes, delayed relative to the half of the pulse on the bus 1 by half the period, From the exit

3 ..

element OR 7, it enters the counting input of the trigger 8 and on the falling edge translates it into a single state. Element And 2 closes 5 and Element 3 opens. At the same time, the low potential from the inverted output of the trigger 8 closes the element 5, prohibiting further arrival of the pulse from the doubler 4 frequency output to the counting input of the trigger 8, the second pulses from the bus 1 stop flowing through the element 2 to the counting input of the display unit 9 - the clock reads are fixed.

The second pulses received on the bus 1 after the start of fixation of the secondary electronic clock, through the element 3 are fed to the counting input of the counter 10. When a given pulse arrives at the output of the counter 0, a transfer pulse is formed, which, on the summing -input of the display unit 9, is in the rear the front increases its content by ten, thereby restoring the indication of the current time by the secondary electronic clock. At the same time, on the trailing edge of the transfer pulse of the counter 10, the trigger 8 is transferred to the zero state. Its output potential closes element 3; opens the element And 2 and prepares the element And 5 for operation. The device switches to the normal display mode.

five

919224

Claims (1)

Invention Formula The device for fixing the readings of the secondary electronic clock, containing 5 first, second and third elements AND, element OR, the first input of which is connected to the output of the third element AND, trigger, the inverse output of which is connected to the first input I of the first fO of the element I, whose output is connected to the counting input of the display unit, the second input of the first element I is connected to the time pulse bus and the first input of the second element I, the second input of which is connected to the forward output of the trigger, the output of the second element I connected to the counting input a pulse counter, the zeroing input of which is connected to the inputs of the zeroing NIN of the display unit, the trigger and the zeroing bus, differs with the fact that, in order to increase the time reading accuracy and take readings, a doubler is entered into it Frequency 25, the input of which is connected to 01INO time pulses, and the output is connected to the first input of the third element I, the second input of which is connected to the fixing pin, the third input 30 of the third element I is connected to the inverse output of the trigger, the counting input of which is connected to the output of the ICI element, the second input of which is connected to the summing input of the reading unit 35 and the transfer output of the pulse counter. Compiled by E. Chevyrin Editor V. Ivanov Tehred I. Popovich Corrector 0. Lugov Order 262/45 Circulation 371 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4